1. Adedeji, O.S., Gbadamosi, A.J., 1999 . Relationship of scrotal circumference to age, bodyweight and the right and left scrotal length in the Red Sokoto goats. In: Proceedings of 26th annual Conference of Nigerian Society for Animal Production, Ilorin, Nigeria 1999:10-13. 3.
2. Agga, G.E., Udala, U., Regassa, F., Wudie, A., 2011 . Body measurements of bucks of three goat breeds in Ethiopia and their correlation to breed, age and testicular measurements, Small Ruminant Research 95 (2011) 133–138, doi:https://doi.org/10.1016/j.smallrumres.2010.09.011.
3. Akpa, G.N., Suleiman, I.O., Alphonsus, C., 2012. Relationships between Body and Scrotal Measurements, and Semen characteristics in Yankasa ram. Continental Journal of Animal and Veterinary Research 2012; 4 (1):7 – 10.
4. Akpa, G.N, Ambali A.L, Suleiman, I.O., 2013. Body Conformation, Testicular and Semen Characteristics as Influenced by Age, Hair Type and Body Condition of Red Sokoto Goat. N Y Sci J 2013;6(7):44-58]. (ISSN: 1554-0200). http://www.sciencepub.net/newyork. 9.
5. Alam, M.K., 2006. Characterization and performance evaluation of white goat in some selected areas of Bangladesh. MS thesis. Department of Animal Breeding and Genetics. Bangladesh Agricultural University, Mymensingh 2006: 43-52. 13.